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Professional Activities

Major activities:
• Research Associate at University of Piraeus, Dept.of Digital Systems, AI-Lab
• Lecturer - University of the Aegean, Dept. of I.C.S.Eng. (2006 - 2010)
• Research scientist - AI-Lab research group at University of the Aegean, Dept. of I.C.S.Eng. (2006 - 2010)
• PostDoc Research scientist - AI-Lab research group at University of the Aegean, Dept. of I.C.S.Eng. (2005 - 2006)
• PostDoc Research scientist - VTT Technical Research Center of Finnland (2011 - 2012)
• Visiting lecturer at University of Zielona Gora, Poland (2009, erasmus LLP)
• Information Technology Manager -North Aegean Regional Administrative Authorities, Samos (public sector administration) in Greece (2000 - today)

Reviewing - Program/Scientific Committees, Editorial Boards activities:

• AI Review journal
• IEEE Intelligent Systems and in IEEE TKDE
• KAIS (Knowledge and Information Systems) Journal
• Journal of Web Semantics (JWS)
• J.UCS - Special Issue in "Ontologies and their Applications"
• Encyclopedia of Data Warehousing and Mining - 2nd Edition

• International Journal of Data Mining, Modeling and Management (IJDMMM) (editorial board)
• Journal of Internet of Things and Cyber-Assurance (IJITCA) (editorial board)

• EUSPN 2016 (SW track co-chair)
• IJCAI 2015
• ANT 2015
• KSEM 2014-2015
• AAAI-15
• ICTAI-2014
• The First International Workshop on Extending Seamlessly to the Internet of Things (esIoT-2012)
• International Conference on Complex, Intelligent, and Software Intensive Systems (CISIS)
• IADIS conference on WWW/Internet
• IEEE International Conference on Tools with Artificial Intelligence (ICTAI)
• Workshop of Ontologies And Their Applications (Brazil)
• AI Conference, SGAI International Conference on Innovative Techniques and Applications of Artificial Intelligence (Cambridge, UK)
• Workshop of Ontology Alignment and Visualization (OnAV08)
• World Summit on the Knowledge Society
• Workshop on Community- based Evolution of Knowledge-intensive Systems (COMBEK)
• International Symposium on Information Technologies in Environmental Engineering

Organization of research events
• Co-Chair of Semantic Web Technologies track at EUSPN-16 conference
• Chair of "International Workshop of Intelligent Systems for Engineering Environmental Knowledge" (http://www.icsd.aegean.gr/kotis/i-seek09/)
• Co-organizer of "Intelligent and collaborative engineering of environmental knowledge: Software platforms, agents and semantics", a special session of iEMSs 2010 conference.

Membership in research groups/societies:
• Hellenic Artificial Intelligence Society (EETN)
• Greek Computer Society (IFIP, CEPIS)
• ERCIM Working Group of Data and Information Spaces (DIS)

Editorials:
• Guest Editor of Special Issue on "Intelligent Systems for Engineering Environmental Knowledge (i-SEEK)", International Journal of Agricultural and Environmental Information Systems (IJAEIS)
• Editor Board Member of International Journal of Data Mining, Modeling and Management (IJDMMM) (www.inderscience.com/ijdmmm)

Research Interests/Activities
• Engineering of ontologies
• Coordination of ontologies
• Ontology Learning
• Semantic Search
• Semantic Grid
• Semantic Wikis and Portals for Collaboration in open settings
• Semantic Portals
• Semantic Interoperability in Smart Environments/IoT